North american ice service (nais) iceberg bulletin 180001Z apr
Labrador Sea · NAVAREA IV 438/24
What this record establishes
Archived notice · 2024-04-19 00:01Z
This notice comes from the historical archive. Its archived status does not establish when or how the reported situation ended.
- Source and dates
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · NAIS 0/24 172000Z APR 24.. Issued 2024-04-17 21:00Z. First collected 2026-08-17 13:38Z; last seen in collection 2026-08-17 15:46Z. Collection dates record ingestion, not a new incident or a fresh field observation.
- Location covered
- Labrador Sea. The map shows the reported line or operation extent; it is not a vessel track. Check the original wording for limits and qualifications.
Related notices and cancellation links
These reports were linked by category and sea, with positions within 30 nautical miles and issue dates within 30 days of another report's recorded in-force span. Links can extend through other members, so the full group can cover a larger area or period. Proximity does not confirm that they describe one incident.
- NAVAREA IV 430/242024-04-15 · Archived notice
- NAVAREA IV 432/242024-04-16 · Archived notice
- NAVAREA IV 438/24 · this notice2024-04-17 · Archived notice
- NAVAREA IV 443/242024-04-18 · Archived notice
- NAVAREA IV 450/242024-04-19 · Archived notice
- NAVAREA IV 452/242024-04-20 · Archived notice
- issued
- 2024-04-17 21:00Z
- status
- Archived notice
- self-cancels
- 2024-04-19 00:01Z
- authority
- NAIS 0/24 172000Z APR 24.
- NAVAREA
- NAVAREA IV
- issued by
- NAIS
- sea
- Labrador Sea
- position
- 57.312, -48.707
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
1. NORTH AMERICAN ICE SERVICE (NAIS)
ICEBERG BULLETIN 180001Z APR.
2. ICEBERG LIMIT ALONG TRACKLINE JOINING
47-29N 052-45W, 48-05N 049-45W,
51-55N 047-20W, 54-45N 049-40W.
3. ESTIMATED ICEBERG LIMIT ALONG
TRACKLINE JOINING
54-45N 049-40W, 56-25N 048-30W,
58-00N 045-25W, 58-55N 041-30W,
62-40N 038-40W, 65-00N 027-30W.
4. WESTERN ICEBERG LIMIT ALONG TRACKLINE
JOINING
50-16N 060-31W, 49-20N 057-50W.
5. SEA ICE LIMIT ALONG TRACKLINES
JOINING:
A. 50-13N 063-13W, 49-51N 060-34W,
51-12N 057-42W, 50-48N 057-04W.
B. 49-34N 054-29W, 52-38N 052-22W,
55-15N 051-56W, 56-41N 057-03W,
60-27N 060-21W, 62-00N 058-54W,
62-58N 057-46W.
C. 62-27N 040-59W, 61-26N 041-19W,
59-46N 042-04W, 59-23N 044-43W,
59-26N 045-34W, 60-36N 049-27W,
61-36N 051-12W, 61-14N 053-32W,
61-56N 054-31W, 63-04N 051-25W.
6. MOST RECENT RECONNAISSANCE:
WESTERN LIMIT ICEBERG FLIGHT 16 APR 24.
7. REPORT POSITION AND TIME OF ANY ICEBERGS
SEA ICE OR STATIONARY RADAR TARGETS THAT
MAY LIKELY BE ICE TO THE NEAREST CANADIAN
COAST GUARD MARINE COMMUNICATIONS AND
TRAFFIC SERVICE STATION OR
USING INMARSAT CODE 42.
8. FOR MORE REPORTING INFORMATION OR TO
DOWNLOAD SHAPEFILES AND WEEKLY PREDICTIONS,
GO TO WWW.NAVCEN.USCG.GOV/IIP.
9. CANCEL THIS MSG 190001Z APR 24.
Reading this warning
- Icebergs and ice limits
- Icebergs, smaller pieces of glacier ice and the published limit of known ice.
- Date-time group (DTG)
- A compact UTC timestamp — day, hour and minute followed by Z — such as 201500Z for the 20th at 15:00 UTC.
- Track line joining
- Introduces a route through a series of positions — a cable route, a tow's track or a survey line.
- Position (degrees and minutes)
- How warnings write positions: degrees, a hyphen, then minutes, with N/S and E/W — 49-40.8N 003-43.8W.
- Inmarsat-C / SafetyNET
- The satellite system that carries NAVAREA warnings to ships at sea, and the terminal number rescue centres give for reports.
- CANCEL THIS MSG
- The warning's own expiry: a line telling the reader when the message cancels itself.
Collected reports in this area · iceberg & sea-ice bulletins
2439 within 180 nm since 2002 · 22 in the last 12 months · 1 listed in force now
Counts include repeat notices about the same situation. NGA archive coverage ends 2024-05; live collection began 2026-08-17. The period between them is incomplete. An empty year is not evidence that no hazards occurred.
- North american ice service (nais) iceberg bulletin 010001Z oct2026-09-30
- North american ice service (nais) iceberg bulletin 300001Z sep2026-09-29
- North american ice service (nais) iceberg bulletin 290001Z sep2026-09-28
- North american ice service (nais) iceberg bulletin 280001Z sep2026-09-27
- North american ice service (nais) iceberg bulletin 250001Z sep2026-09-24
- North american ice service (nais) iceberg bulletin 240001Z sep2026-09-23
Month of issue in the collected archive
All available years combined. Uneven collection and repeat bulletins affect these counts; this chart does not measure the seasonality or probability of incidents.
Nearby notices listed in force · within 120 nm
No other collected notice is currently listed in force within this radius. This does not establish safe conditions.
Worldwide in the collected sources
6 iceberg & sea-ice bulletins listed in force · see all
Record snapshot 2026-10-01 23:19Z; source collection times vary.
Icebergs
Iceberg limits and reported bergs — mostly the North American Ice Service (International Ice Patrol) bulletins in the North Atlantic. All current iceberg & sea-ice bulletins →
Not for navigation. This is a re-rendering of an official navigational warning for awareness; mariners must use official NAVAREA broadcasts and their national MSI service.